I gotta say... Your documentation is really good. You definitely have more experience with node red than myself so I am not sure how one would improve upon your work so far. Plus most of my improvements would probably be a little advanced for the aim of your project as I tend to go down a rabbit hole whenever I automate something lol.
Mostly, my two cents are for if you want to go further towards a smart pump and getting more data into home assistant:
- Look for a way to track the flow of water through the pump to watch for signs of blockage or pump failure.
- Look at what options would you have for water quality sampling/intervention (if you do any maintenance for that).
Actually, I think there is a a dedicated instance for the kinks and other NSFW communities lol